Polyurethane graphite oxide composites, process of manufacture and use as flame retardant in fire proof seals

摘要

A polyurethane-graphite oxide composite material contains graphite oxide, which is present in an expandable form in a polyurethane matrix. Independent claims are also included for: (1) a method for preparation of polyurethane-graphite oxide composite material, in which a polyol is intercalated in graphite oxide and subsequently, the graphite oxide intercalation compound obtained is reacted with polyisocyanate to form the polyurethane or a polyisocyanate is intercalated in graphite oxide and subsequently, the graphite oxide intercalation compound is reacted with polyol to the polyurethane; and (2) a method of sealing openings in walls and ceilings which comprises introducing into the openings polyurethane-graphite oxide composite material.